Reference8:Administration/Relay/Interfaces/Physical

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On this page a physical interface (ISDN or FXS) can be configured for Gateway use. Number mapping may be configured to normalize the called and calling numbers for internal use. An interface may be registered to a gatekeeper. If this is configured a VOIP interface and routes are generated automatically.

Contents

General Configuration

Name Name of the interface. This name is used for local administration only (e.g. it is display in the routing table)
Disable Used to disable the interface without deleting the config
Tones This configures the tone scheme for this interface

Interface Maps

The number mapping on the interface can be either configured manually, or predefined mappings for ISDN Point to Point or ISDN Point to Multipoint interfaces can be used. If predefined mappings are used they can be edited the same way as manual mappings, but if they are changed they are not recognized as predefined mapping anymore. Please read also Reference:Administration/Gateway/Interfaces#ISDN interfaces (PPP, TEL1-4, BRI1-4, PRI1-4)

Point to Point

With the use of a few parameters the Point to Point mapping maps between an external representation of the numbers using the type of number field and an internal representation using Unknown as type of number and prefixes.

Area Code The prefix used to convert from a subscriber number to a national number
Subscriber Number The prefix used to convert from an extension to a subscriber number
National Prefix The prefix used to mark a number as National
International Prefix The prefix used to mark a number as International

Point to Multipoint

With the use of a few parameters the Point to Point mapping maps between an external representation of the numbers using the type of number field and an internal representation using Unknown as type of number and prefixes. Three external numbers (MSNs) are mapped to internal extensions.

MSN1-3,Ext. The external subscriber numbers and the internal extensions they are mapped to.
National Prefix The prefix used to mark a number as National
International Prefix The prefix used to mark a number as International

Registration

The physical interface may be registered using H.323 or SIP. For the VOIP call the media properties can be configured.

Media Properties

General Coder Preference The coder preference (Coder,Framesize, Silence Compression) to be used if a non-local media address is detected. If the preference is marked as exclusive no other coder is offered.
Local Network Coder The coder preference if a local media address is detected.
Enable T.38 Switches on Fax detection and switchover to T.38
No DTMF Detection Special mode to switch off DTMF detection during a call. If checked DTMF is transfered inband during a call. Use G711 coder and a link with no packet loss to transfer DTMF inband. This option can be used to transfer continous DTMF tones for some special applications. Out of band DTMF tones have a fixed length of approx 150ms.
Enable PCM Enable the media to be connected using the local timeslot switch if the call is between physical interfaces of the same gateway.
MOH Mode Special mode to use a physical interface as Music on Hold Source. The media is one way only and multiple calls are connected to the same channel on the physical interface. In this case the configured coder is used exclusively, even if not marked as exclusive.
Record to (URL) HTTP url where the recording file is to be stored. HTTP server must allow write access (PUT) at this location. One PCAP file is written for every call via this interface containing both RTP streams. Audio streams can be played using Wireshark. PCAP file can be converted into WAV file using pcap2wav tool.

H.323

Registration to a H.323 Gatekeeper

SIP

Registration to a SIP Server

Feature Code Support

The Feature Code Support turns on Supplemenatary services for a single endpoint connected to the physical interface, which can be invoked using *# dial sequences.

Dynamic Group The name of the group which membership can be changed using *# sequences from the endpoint.
Direct Dial Number to be dialed on off-hook. This only works if feature code support is enabled.
Locked White List A whitelist of numbers, seperated by ',' which may be still dialed if the endpoint is locked using *# ssequences.
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